I woke up around 4am, read this, and wondered if I was still in a dream state given the meandering nature of it.

Were the man page musings written in response to the (alleged, but... uh... NSA) kleptographic backdoor in Dual_EC_DRBG? It requires multiple successive outputs to compromise and derive internal PRNG state, if memory serves.

In that one construction, /dev/random blocking on seeding would have a mild state-hiding advantage over /dev/urandom, I imagine... but, sheesh. Nobody use that generator.